#coding=utf-8
from threading import Thread
from time import sleep
class MyThread(Thread):
    def __init__(self,name):
        Thread.__init__(self)
        self.name = name
    def run(self):
        print(f"线程{self.name},start")  # format
        for i in range(3):
            print(f"线程{self.name},{i}")
            sleep(3)
        print(f"线程{self.name},end")
if __name__ == '__main__':
    print("主线程，start")
    #创建线程
    t1 = MyThread("t1")
    t2 = MyThread("t2")
    #启动线程
    t1.start()
    t2.start()
    print("主线程,end")